package 队列;

import java.util.ArrayList;
import java.util.List;

/**
 * @description:
 * @author: ChenYunChou
 * @time: 2021/5/6 2021
 */
public class test {
    public static void main(String[] args) {
        List<String> a = new ArrayList<String>();
        a.add("1");
        a.add("2");
        System.out.println(a.contains("3"));
    }
}
